OFFSET
0,5
LINKS
Ray Chandler, Table of n, a(n) for n = 0..1000
Ray Chandler, Mathematica program
G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.
M. Oura, The dimension formula for the ring of code polynomials in genus 4, Osaka J. Math. 34 (1997), 53-72.
Bernhard Runge, On Siegel modular forms, part II, Nagoya Math. J. 138, 179-197 (1995).
FORMULA
Oura gives an explicit formula for the Molien series.
EXAMPLE
1+x^8+x^12+2*x^16+3*x^20+7*x^24+7*x^28+19*x^32+27*x^36+O(x^40).
MATHEMATICA
See link for Mathematica program.
CROSSREFS
KEYWORD
nonn,nice,easy
AUTHOR
STATUS
approved